Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb1047f24b88f1e…

MALICIOUS

PDF

75.5 KB Created: 2021-09-04 08:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ffcfb6dfa79f025c0f2de8433062a150 SHA-1: dd77f37243036a073de99f58e938400870cd1f1b SHA-256: beb1047f24b88f1e3faf9dbe8d3eff230e759e4b7959db27144e05fc912e1d87
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, suggesting an attempt to host and distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' specifically highlights the use of compromised CMS upload directories to host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0714078fc---bexokawigeriteba.pdf In PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/38864493063.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/19182820538.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/65681629596.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/vajaliveluw.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/pezis.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/52880966751.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fb231ef97---54536491378.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/30341902934.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/supiwemidomolinat.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/dl9mo63obav6steriai4p460p3/wagibubanagiwodovasiri.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/30520431251.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/xorugiwefavamazovide.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723b7ed7432---nibotaf.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/m4tf191838t972lb0kocv6ijv1/xolerubowifivozoreba.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a33e54c4f9---bifesobasejewifajiloted.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/42e9837ddbc1cee644069d5cba6d8efb/85190282888.pdfIn PDF document text
    • https://fishuntpesca.it/file/mapuzazifakeweg.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/nevexiwodimebek.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083faa42fd9b---35576972658.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/90244614720.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/51435694287.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/93232beacde9aca5ca15a9d7ca8bc3f7/gefavitusumesunikonorogo.pdfIn PDF document text
    • https://carrieres-pierre.com/userfiles/file/gekuvofabesixolafotedos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=mixer+behringer+vmx300usb+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAD 11032 bytes
SHA-256: 7dde66c95e4ac444d230e5f1a0d8abda99c5e08b961cc474e6a961183f859348
font_01_sfnt_off0000d52f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52F 19012 bytes
SHA-256: 4963172437801e3ceef3879f71eed40b83d9f69cef3fd7ed0a8ef304a3f7a200
font_02_sfnt_off000106c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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